<template>
  <form action="/">
    <van-search
        v-model="searchText"
        show-action
        placeholder="请输入搜索关键词"
        @search="onSearch"
        @cancel="onCancel"
    />
  </form>

  <van-divider content-position="left">已选标签</van-divider>
  <div v-if="activeIds.length === 0">请选择标签</div>
  <van-row gutter="16" style="padding: 0 16px">
    <van-col v-for="tag in activeIds">
      <van-tag closeable size="small" type="primary" @close="doClose(tag)">
        {{tag}}
      </van-tag>
    </van-col>
  </van-row>

  <van-divider content-position="left">选择标签</van-divider>
  <van-tree-select
      v-model:active-id="activeIds"
      v-model:main-active-index="activeIndex"
      :items="tagList"
  />
  <div style="padding: 16px">
    <van-button type="primary" block @click="doSearchResult">搜索</van-button>
  </div>
</template>

<script setup>
import { ref } from 'vue';
import { showToast } from 'vant';
import {useRouter} from "vue-router";

const searchText = ref('');

const router = useRouter();

//所有标签
const originTagList = [{
  text: '性别',
  children: [
    { text: '男', id: '男' },
    { text: '女', id: '女' },
  ],
}, {
    text: '精通位置',
    children: [
      { text: '上路战士', id: '上路战士' },
      { text: '中路法师', id: '中路法师' },
      { text: '打野刺客', id: '打野刺客' },
      { text: '射手ad', id: '射手ad' },
      { text: '辅助坦克', id: '辅助坦克' },
      { text: '全能大师', id: '全能大师' },
    ],
  },
];

//标签列表
let tagList = ref(originTagList);

/**
 * 搜索过滤
 * @param val
 */
const onSearch = (val) => {
  tagList.value = originTagList.map(parentTag => {
    const tempChildren = [...parentTag.children];
    const tempParentTag = {...parentTag};
    tempParentTag.children = tempChildren.filter(item => item.text.includes(searchText.value));
    return tempParentTag;
  });
}

const onCancel = () => {
  searchText.value = '';
  tagList.value = originTagList;
};

//左侧索引
const activeIndex = ref(0);
//右侧索引，已选中的标签
const activeIds = ref([]);

//移除标签
const doClose = (tag) => {
  activeIds.value = activeIds.value.filter(item => {
    return item !== tag;
  })
}

/**
 * 执行搜索
 */
const doSearchResult = () => {
  router.push({
    path: '/user/list',
    query: {
      tags: activeIds.value
    }
  })
}

</script>

<style scoped>

</style>
